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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1168054	Cimarex Energy Co	XEC	Crude Petroleum & Natural Gas (1311)	450466694

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1196793	Hans Helmerich	C/O Cimarex Energy Co. 1700 Lincoln Street, Suite 1800 Denver CO 80203		No	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2013-03-15	52,000	$77.74	400,000	No	4	S	Indirect	Trustee of Estate of W.H. Helmerich III

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	Trustee of Estate of W.H. Helmerich III

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	15,686	Direct
Common Stock	50,611	Indirect	Trustee, 1993 Hans Helmerich Trust
Common Stock	3,140	Indirect	By Daughter Sunday
Common Stock	11,450	Indirect	By Wife
Common Stock	1,062	Indirect	Co-Trustee of Family Trust
Common Stock	7,865	Indirect	Trustee of Family Trust
Common Stock	2,157	Indirect	By daughter Hailey
Common Stock	55,000	Indirect	Co-Trustee of The Helmerich Foundation

Footnotes

Includes 4,869 shares of restricted stock and 8,838 restricted stock units.
Mr. Helmerich disclaims beneficial ownership of these shares.
The price reported in Column 4 for March 15, 2013 sales is a weighted average price. These shares were sold in multiple transactions at prices ranging from $77.50 to $78.005, inclusive. The reporting person undertakes to provide to Cimarex Energy Co., any security holder of Cimarex Energy Co. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.